Have you ever run into 'NIF' invisible in Game after Converting it from LE to SSE ?

[coldloc]

One thing we know for sure is that  Nif file format tolerance is more fragile when in SSE edition than the oldrim Skyrim LE.  

then sometimes after converting your nif file and run in SSE,  they would become invisible even if  appeared normally in  NIfscope or 3d max preview result. 

the cause of it unknown.  

 

 

the current workaround i used for force it back to visible in SSE

is to open each nif file converted ( via SSE NIF Optimizer  or  Cathedral Assets Optimizer)

then double check 

 

if the model_space_normals_flag is unchecked after convertion , the nif will be still visible in Skyrim LE,  but invisible in Skyrim SSE. 

https://mega.nz/file/Ai4ASQKa#e1DxePqGl8-ry6bsxxzF1n0gHfEovr-5FKkmat9w0xI

 

I'm not sure what's the root cause of this and how , or better way to overcome this duirng mod convertions. 

if you know how please share your ideas.